Situational Assessmentof Influenza post 2009 Pandemic - a brief review

• Autor(a) principal: Gomes, Érica Valessa Ramos
• Data de Publicação: 2015
• Outros Autores: Tolentino, Fernanda Modesto, Santi, Milena Polotto de, Montanha, Janaína Olher Martins, Watanabe, Aripuanã Sakurada Aranha
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Hansenologia Internationalis (Online)
• Texto Completo: https://periodicos.saude.sp.gov.br/hansenologia/article/view/35006
• topic: Influenza; H1N1; , Sentinela de Gripe; Vacinação; Influenza; H1N1; Sentinel Influenza; Vaccination

Influenza viruses are responsible for annual epidemics with patients presenting variable degrees of disease severity. These virus can cause acute respiratory infection with a high transmissibility due to its high genetic variability, adaptability and rapid spread. Influenza viruses have fragmented genome which causes frequent antigenic variation, which can result in more virulent subtypes emergence, as occurred in 2009 when it was described a new pandemic influenza virus H1N1. WHO estimates that flu affects 5-15% of the population and it causes 3 to 5 million of severe cases and 250.000 to 500.000 deaths annually. The annual influenza epidemics and the new pandemics risk highlights the importance of Influenza virus epidemiological monitoring. Based in this concern WHOcreated and coordinates the Global Influenza Surveillance and Response System in order to provide necessary information for viral variants selection that will be part of vaccine annual composition, since that, vaccination is one of the most effective measures for influenza prevention and its complications. In addition, the network is a rapid surveillance of emerging influenza virus identifications with potential to cause epidemic or pandemic situations. The surveillance is enable due to laboratory tests results which are important tools for public health, with essential role for circulating viruses containment and prevention. The aim of this study was to present information related to influenza virus and flu disease, how the diagnosisand monitoring are performed by global surveillance networks at post pandemic time and, also,the new challenges facing.